US4070495A - Microscope slide - Google Patents
Microscope slide Download PDFInfo
- Publication number
- US4070495A US4070495A US05/672,572 US67257276A US4070495A US 4070495 A US4070495 A US 4070495A US 67257276 A US67257276 A US 67257276A US 4070495 A US4070495 A US 4070495A
- Authority
- US
- United States
- Prior art keywords
- methylene blue
- colored
- dyestuffs
- microscope slide
- dyestuff
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- CXKWCBBOMKCUKX-UHFFFAOYSA-M methylene blue Chemical compound [Cl-].C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 CXKWCBBOMKCUKX-UHFFFAOYSA-M 0.000 claims abstract description 15
- VHGXRGXCDVQIKS-KRWDZBQOSA-N methyl (2s)-3-(4-methylphenyl)sulfonyloxy-2-(phenylmethoxycarbonylamino)propanoate Chemical compound C([C@@H](C(=O)OC)NC(=O)OCC=1C=CC=CC=1)OS(=O)(=O)C1=CC=C(C)C=C1 VHGXRGXCDVQIKS-KRWDZBQOSA-N 0.000 claims abstract description 12
- 210000004369 blood Anatomy 0.000 claims abstract description 11
- 239000008280 blood Substances 0.000 claims abstract description 11
- 238000011835 investigation Methods 0.000 claims abstract description 7
- 239000011248 coating agent Substances 0.000 claims abstract 2
- 238000000576 coating method Methods 0.000 claims abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- 239000000975 dye Substances 0.000 description 15
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 12
- 238000010186 staining Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000000746 purification Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 230000004069 differentiation Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical group [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 3
- 210000003651 basophil Anatomy 0.000 description 3
- 210000001772 blood platelet Anatomy 0.000 description 3
- 238000004587 chromatography analysis Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 210000003979 eosinophil Anatomy 0.000 description 3
- 210000003743 erythrocyte Anatomy 0.000 description 3
- SQHOAFZGYFNDQX-UHFFFAOYSA-N ethyl-[7-(ethylamino)-2,8-dimethylphenothiazin-3-ylidene]azanium;chloride Chemical compound [Cl-].S1C2=CC(=[NH+]CC)C(C)=CC2=NC2=C1C=C(NCC)C(C)=C2 SQHOAFZGYFNDQX-UHFFFAOYSA-N 0.000 description 3
- 210000000265 leukocyte Anatomy 0.000 description 3
- 210000004698 lymphocyte Anatomy 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- PQLVXDKIJBQVDF-UHFFFAOYSA-N acetic acid;hydrate Chemical compound O.CC(O)=O PQLVXDKIJBQVDF-UHFFFAOYSA-N 0.000 description 2
- 238000004820 blood count Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 210000003714 granulocyte Anatomy 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 210000001616 monocyte Anatomy 0.000 description 2
- 210000000440 neutrophil Anatomy 0.000 description 2
- 210000001995 reticulocyte Anatomy 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 235000005074 zinc chloride Nutrition 0.000 description 2
- 239000011592 zinc chloride Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- ZHAFUINZIZIXFC-UHFFFAOYSA-N [9-(dimethylamino)-10-methylbenzo[a]phenoxazin-5-ylidene]azanium;chloride Chemical compound [Cl-].O1C2=CC(=[NH2+])C3=CC=CC=C3C2=NC2=C1C=C(N(C)C)C(C)=C2 ZHAFUINZIZIXFC-UHFFFAOYSA-N 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- MDKXBBPLEGPIRI-UHFFFAOYSA-N ethoxyethane;methanol Chemical compound OC.CCOCC MDKXBBPLEGPIRI-UHFFFAOYSA-N 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hcl hcl Chemical compound Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002198 insoluble material Substances 0.000 description 1
- 230000000366 juvenile effect Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- SHXOKQKTZJXHHR-UHFFFAOYSA-N n,n-diethyl-5-iminobenzo[a]phenoxazin-9-amine;hydrochloride Chemical compound [Cl-].C1=CC=C2C3=NC4=CC=C(N(CC)CC)C=C4OC3=CC(=[NH2+])C2=C1 SHXOKQKTZJXHHR-UHFFFAOYSA-N 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 229920003217 poly(methylsilsesquioxane) Polymers 0.000 description 1
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 1
- 235000010483 polyoxyethylene sorbitan monopalmitate Nutrition 0.000 description 1
- 239000000249 polyoxyethylene sorbitan monopalmitate Substances 0.000 description 1
- 229920000053 polysorbate 80 Polymers 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 210000003660 reticulum Anatomy 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
Definitions
- This invention relates to a pre-colored microscope slide for blood investigations.
- the differential blood count is one of the most frequently carried out microscopic methods.
- the individual blood particles erythrocytes, leukocytes, thrombocytes, etc.
- dyestuffs which permit a microscopic differentiation and the recognition of pathological changes.
- the previously employed staining processes involve several steps, for example, preparing a blood smear, fixing, in some cases several stainings, washing and drying and are, therefore, very laborious.
- the quality of the staining depends very considerably upon the quality of the dyestuffs employed, as well as upon the training and experience of the personnel involved.
- the stainings are generally dull, diffuse and lacking in contrast and, in addition, the three different forms of the granulated leukocytes (eosinophils, neutrophils and basophils) can only be differentiated with difficulty.
- FIG. 1a and 1b are top plane and side views, respectively, of a microscopic slide according to the invention.
- the methylene blue N is preferably used in the form of its monohydrochloride instead of the commercially available zinc double salt.
- German Pat. No. 2,153,673 gives no indication of the quality of the dyestuffs used.
- pre-colored microscope slides are obtained, the staining properties of which correspond to those of this German Patent (see pages 5 -6 thereof).
- Methylene blue N (new methylene blue, C.I. Basic Blue 24, 3,7-bis-(N-ethylamino)-2,8-dimethylphenothiazonium chloride) is commercially available in about 50 - 70% purity and, according to our own findings, thin layer chromatographic analysis shows three to four additional spots in varying amounts. The remainder is zinc chloride and sodium chloride.
- an excellent purification of methylene blue N can be carried out by dissolving this dyestuff in water and precipitating out the hydrochloride thereof with hydrochloric acid. There is thus obtsined a chormatographically pure product which only contains about 0.5% zinc chloride and is in the form of the monohydrochloride.
- Cresyl violet acetate (Cresylechtviolett, Cresyl Fast Violet acetate, 5,9-diaminobenzo (a)phenoxazonium acetate) is commercially available, contaminated with more or less large amounts of sodium acetate. In this case, too, thin layer chromatographic analysis shows three additional spots in varying amounts. Purification of this dyestuff can be carried out in the following manner: The sodium acetate is first removed by careful digestion with water. Thereafter, the dyestuff is dissolved in methanol and precipitated out with diethyl ether. Repetition of this procudure gives a chromatographically pure product.
- the dyestuffs purified in the above-described manner dissolve in methanol without leaving a residue and can be applied to microscope slides in the manner described on page 4 of the above-mentioned German Pat. No. 2,153,673. Furthermore, according to the teachings in German Pat. No. 2,424,955, they can be dissolved in water and applied, together with polyoxyethylene-sorbitan monopalmitate (Tween 80)
- the dyestuff solutions are sprayed on to microscope slides in the manner described in co-pedning application Ser. No. 672,574 filed Mar. 31, 1976 (German Patent Application No. P 25 15 869.4).
- the purified dyestuffs are preferably applied to the microscope slides in total amounts of about 0.5 to 10 ⁇ /cm 2 .
- the ratio of methylene blue N to cresyl violet acetate may thereby vary between the values of 1:1.5 to 1:5.
- the pre-coated microscope slides according to the present invention can, as described on pages 4 to 5 of German Pat. No. 2,153,673, be provided with a drop of blood and then covered with a cover slip; after about 3 to 5 minutes, microscopic examination can be carried out witha an oil immersion objective.
- the granula of the eosinophils have a luminescent yellow color, in comparison with the there-described orange coloration.
- the granula of the basophils are orange-red colored, in comparison with the there-described purple coloration.
- the orange coloration which is the most effectively identifiable characteristic, there only occurs on the edge of the cells in the case of suitable focussing.
- a further advantage of the microscope slides according to the present invention is that the stainings no longer depend upon variations of quality of commercially available dyestuffs. In the case of the large-scale production of large numbers of microscope slides, the reproducibility with regard to dyestuff application and composition is of the greatest possible importance.
- the microscope slides can be made from glass. However, insofar as the dyestuffs are sprayed on in the manner described in co-pending Application Ser, No. 672,574 (German Patent Application No. P 25 15 869.4), synthetic resin microscope slides can also be used, whereby the dyestuff can, of course, also be applied to cover slips made from glass or synthetic resin.
- cresyl violet acetate obtained from Matheson, Coleman & Bell
- 50 g. cresyl violet acetate obtained from Matheson, Coleman & Bell
- the dyestuff was filtered off with suction and washed twice with 100 ml. amounts of ice-cold water.
- the filter residue was dissolved, with warming, in 1.6 liters methanol and insoluble material removed by suction filtration at about 30° C.
- the filtrate was slowly mixed, while stirring, with 3.5 liters diethyl ether and then further stirred for 30 minutes, while cooling with ice.
- the crystals formed were filtered off with suction, dissolved, with warming, in 620 ml. methanol and the solution is cooled to 30° C.
- the dyestuff was precipitated out by the addition of 1.85 liters diethyl ether, while stirring and cooling with ice. After filtering off with suction and washing three times with 120 ml. amounts of diethyl ether-methanol (3:1), there were obtained, after drying over phosphorus pentoxide, 22 g. cresyl violet acetate in the form of dark green crystals. This product contains, by weight, about 82% violet acetate, 8% cresyl violet chloride and 10% water. Upon heating to 150° C., decomposition occurs. According to chromatographic investigation (DC finished plate, silica gel 60 F 254, Merck; elution agent system n-butanol-glacial acetic acid-water 4:1:5), the substance was practically pure; R F value: 0.6.
- the purified dyestuff contains, by weight, 95 - 97% methylene blue N chloride hydrochloride, as well as 3 - 5% water. Zinc was only present in traces. According to chromatographic investigation (DC finished plate silica gel 60 F 254, Merck; elution agent system n-butanol-glacial acetic acid-water 4:1:5), the dyestuff was practically pure; R F value: 0.5)
- a solution was prepared of the following composition, using the purified dyestuffs according to Examples 1 and 2:
- cresyl violet acetate 270 mg.
- This solution was coated as a film, using a swab of cottonwool, on to a microscope slide and then dried or was sprayed from a 0.5 mm. wide spray nozzle (SS 60 67228-45 of the firm Spraying Systems) with a spraying angle of about 25° at a distance of 20 cm. through a mask in a breadth of 3 cm. on to a microscope slide which passed below the nozzle at a speed of 1.5 meters/minute.
- the spray pressure was 1.2 ats. and the rate of flow through the nozzle was 10 ml./minute.
- the amount of dyestuff applied is about 3 ⁇ g./cm 2 .
- a drop of blood with a volume of about 5 - 10 ⁇ l. was applied to the pre-colored microscope slide and then covered with a cover slip. After about 3 to 5 minutes, the staining was assessed under a microscope at about 800 fold magnification, using an oil immersion objective.
- the individual particles of the blood have the following stainings:
- reticulocytes purple-colored reticulum within the scarcely colored erythrocytes.
- neutrophils purple-colored nucleus within a fine granulated, almost colorless plasma.
- eosinophils purple-colored nucleus within a coursely granulated yellow plasma.
- basophils dark purple-colored nucleus within an average-sized, compact granulated orange-red colored plasma.
- lymphocytes purple-colored nucleus with bright purple-colored plasma.
- monocytes like lymphocytes but larger and with more plasma.
- thrombocytes small purple-colored particles.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Sampling And Sample Adjustment (AREA)
- Microscoopes, Condenser (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2515966A DE2515966C3 (de) | 1975-04-11 | 1975-04-11 | Vorgefärbte Objektträger für die Blutunte rsuchung |
| DT2515966 | 1975-04-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US4070495A true US4070495A (en) | 1978-01-24 |
Family
ID=5943661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US05/672,572 Expired - Lifetime US4070495A (en) | 1975-04-11 | 1976-03-31 | Microscope slide |
Country Status (23)
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185085A (en) * | 1976-11-09 | 1980-01-22 | Boehringer Mannheim Gmbh | Differential diagnostic sperm examination |
| US4193980A (en) * | 1978-01-05 | 1980-03-18 | Corning Glass Works | Dry preparation for reticulocyte staining |
| US4248821A (en) * | 1979-07-25 | 1981-02-03 | Dellen Adrian F Van | Method and device for embedding a specimen for microscopic examination |
| US4606950A (en) * | 1984-08-31 | 1986-08-19 | Ellen M. Corbet | Method for assembling a floral arrangement |
| US5106744A (en) * | 1990-11-01 | 1992-04-21 | Cytocolor Inc. | Method of staining monocytes and compositions thereof |
| US20210181085A1 (en) * | 2017-10-26 | 2021-06-17 | Essenlix Corporation | Rapid measurement of platelets |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4400370A (en) * | 1980-03-12 | 1983-08-23 | Lawrence Kass | Metachromatic dye sorption means for differential determination of leukocytes |
| US4581223A (en) * | 1980-03-12 | 1986-04-08 | Lawrence Kass | Individual leukocyte determination by means of differential metachromatic dye sorption |
| CA1155041A (en) * | 1980-04-21 | 1983-10-11 | Michael E. Jolley | Fluorescent nucleic acid stains |
| US4500509A (en) * | 1981-03-11 | 1985-02-19 | Lawrence Kass | Metachromatic dye sorption and fluorescent light emmisive means for differential determination of developmental stages of neutrophilic granulocytic cells and other leukocytes |
| DK1799662T3 (da) | 2004-09-23 | 2013-07-15 | Wista Lab Ltd | Fremgangsmåder til kemisk syntese og oprensning af diaminophenothiaziniumforbindelser, herunder methylthioniniumchlorid (MTC) |
| MY162313A (en) | 2006-07-11 | 2017-05-31 | Wista Lab Ltd | Methods of synthesis and/or purification of diaminophenothiazinium compounds |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3906120A (en) * | 1970-10-30 | 1975-09-16 | Gen Electric | Method for preparing slides for blood evaluation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT966513B (it) * | 1970-10-30 | 1974-02-20 | Gen Electric | Vetrini precolorati per esami del sangue |
| US3796594A (en) * | 1970-10-30 | 1974-03-12 | Gen Electric | Stain coated slides for differentially staining blood |
| GB1473945A (en) * | 1973-05-24 | 1977-05-18 | Gen Electric | Method for preparing slides for blood evaluation |
-
1975
- 1975-04-11 DE DE2515966A patent/DE2515966C3/de not_active Expired
-
1976
- 1976-02-27 SE SE7602728A patent/SE420355B/xx unknown
- 1976-03-31 DK DK149876A patent/DK145318C/da not_active IP Right Cessation
- 1976-03-31 US US05/672,572 patent/US4070495A/en not_active Expired - Lifetime
- 1976-04-01 CA CA249,401A patent/CA1052675A/en not_active Expired
- 1976-04-05 HU HU76BO1607A patent/HU176928B/hu unknown
- 1976-04-05 FI FI760911A patent/FI59677C/fi not_active IP Right Cessation
- 1976-04-05 AR AR262783A patent/AR210757A1/es active
- 1976-04-06 GB GB13853/76A patent/GB1480576A/en not_active Expired
- 1976-04-06 DD DD192223A patent/DD123628A5/xx unknown
- 1976-04-07 NL NL7603628A patent/NL7603628A/xx not_active Application Discontinuation
- 1976-04-07 BE BE165900A patent/BE840454A/xx not_active IP Right Cessation
- 1976-04-07 IT IT22060/76A patent/IT1059617B/it active
- 1976-04-07 CH CH439376A patent/CH621629A5/de not_active IP Right Cessation
- 1976-04-07 CS CS762302A patent/CS205019B2/cs unknown
- 1976-04-08 SU SU762346753A patent/SU904536A3/ru active
- 1976-04-09 AT AT262076A patent/AT350190B/de not_active IP Right Cessation
- 1976-04-09 ES ES446836A patent/ES446836A1/es not_active Expired
- 1976-04-09 FR FR7610487A patent/FR2307271A1/fr active Granted
- 1976-04-09 LU LU74738A patent/LU74738A1/xx unknown
- 1976-04-09 IE IE752/76A patent/IE42552B1/en unknown
- 1976-04-10 PL PL1976188674A patent/PL107576B1/pl unknown
- 1976-04-12 JP JP51041173A patent/JPS51126893A/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3906120A (en) * | 1970-10-30 | 1975-09-16 | Gen Electric | Method for preparing slides for blood evaluation |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185085A (en) * | 1976-11-09 | 1980-01-22 | Boehringer Mannheim Gmbh | Differential diagnostic sperm examination |
| US4193980A (en) * | 1978-01-05 | 1980-03-18 | Corning Glass Works | Dry preparation for reticulocyte staining |
| US4248821A (en) * | 1979-07-25 | 1981-02-03 | Dellen Adrian F Van | Method and device for embedding a specimen for microscopic examination |
| US4606950A (en) * | 1984-08-31 | 1986-08-19 | Ellen M. Corbet | Method for assembling a floral arrangement |
| US5106744A (en) * | 1990-11-01 | 1992-04-21 | Cytocolor Inc. | Method of staining monocytes and compositions thereof |
| US20210181085A1 (en) * | 2017-10-26 | 2021-06-17 | Essenlix Corporation | Rapid measurement of platelets |
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